'NPM Install Error:Unexpected end of JSON input while parsing near '...nt-webpack-plugin":"0'

When creating a new Angular 5 project:

node version: 8.9.2

npm version: 5.5.1

My Command is:

npm install -g @angular/cli

The Error is:

npm ERR! **Unexpected end of JSON input while parsing near '...nt-webpack-plugin":"0'**
npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\Aashitec\AppData\Roaming\npm-cache\_logs\2017-12-06T13_10_10_729Z-debug.log

The error log is here

Solution 1:^[1]

This solved it for me:

Open Windows Powershell as admin

npm cache clean --force
npm install -g @angular/cli

https://devblogs.microsoft.com/premier-developer/getting-started-with-node-js-angular-and-visual-studio-code/

Solution 2:^[2]

Solution:

npm cache clean --force

then try again to create your app (here when creating a react app) or install what you were about to install.

create-react-app myproject

(creating react app)[same npm problem that can occur in different operation]

npm install -g @angular/cli@latest

(installing angular cli (or installing anything else))

It will work.

explanation:

That's a problem related to npm, it's about the cache that get corrupt. Even though in newer versions of npm they implemented self healing, which normally guarantee no corruption, but it seem it's not that efficient. Forcing clean cache resolve the problem.

The error happen when parsing one of the cache files, which have a json format. The cache is found at ~/.npm/_cacache (in linux) and %AppData%/npm-cache (windows). For my current npm version and when i checked, there was three directories.

if you check the first or the second, the structure is as follow

And each cache file have a json format (and that what get parsed)

Here a good link from the doc: https://docs.npmjs.com/cli/cache

[Update] Also if it happen that this didn't solve it, you may check this answer here https://stackoverflow.com/a/50191315/7668448 it show how you can change the npm registry, that can be helpful. Check and see.

Solution 3:^[3]

npm cache clean --force

doesn't work. try

npm cache clean --force
npm update

Solution 4:^[4]

Npm uses Cache for downloading new packages for you. You need to clear your npm cache. use following command to clean :

npm cache clean --force

then normally use your npm install command e.g.

npm install -g @angular/cli

Solution 5:^[5]

I solve that with

npm cache clean --force

then update npm

npm i npm@latest -g

then normally use your npm install command

npm install

Solution 6:^[6]

delete npm and npm-cache folders in C:\Users\admin\AppData\Roaming\ (windows) then execute cmd

npm cache clear --force

npm cache verify

update npm to latest version

npm i -g npm

then create your project 1)Angular

npm i -g @angular/cli@latest

ng new HelloWorld

2)React

npm i -g create-react-app

create-react-app react-app

Solution 7:^[7]

None of the 30 answers here worked for me. I needed to:

delete node_modules and package-lock.json
npm cache clean --force
npm install -g @angular/cli
npm i --package-lock-only
npm ci

Phew!

Solution 8:^[8]

this solved it npm cache clean --force

Solution 9:^[9]

Simple solutions:

npm cache clean --force
npm install

Solution 10:^[10]

This command alone solved my problem:

npm cache clean --force

Also you should make sure you are using the correct version of node.

Using nvm to manage the node version:

nvm list; # check your local versions;
nvm install 10.10.0; # install a new remote version;
nvm alias default 10.10.0; # set the 10.10.0 as the default node version, but you have to restart the terminal to make it take effect;

Solution 11:^[11]

I use Windows and removed all the files that were listed below and my problem was solved C:\Users{{your-username}}\AppData\Roaming\npm-cache

Solution 12:^[12]

npm cache clean --force worked for me

Error Resolved :

$ npm install -g gulp npm WARN deprecated [email protected]: gulp-util is deprecated - replace it, following the guidelines at https://medium.com/gulpjs/gulp-util-ca3b1f9f9ac5 npm ERR! Unexpected end of JSON input while parsing near '.../RGs88STtAtiMP3tCiNdU'

npm ERR! A complete log of this run can be found in: npm ERR! C:\Users\admin\AppData\Roaming\npm-cache_logs\2018-11-20T07_38_56_733Z-debug.log

Solution 13:^[13]

Solution

npm cache clean --force

For Windows : go to C:\Users\username\AppData\Roaming\npm-cache
Delete all files and run

npm install && npm start

Solution 14:^[14]

I solved that by first cleaning the cache using

npm cache clean --force

Then

npm install -g @angular/cli

Solution 15:^[15]

My case - Windows 7 (had nothing better at the needed moment). Helped me the following:

Deleting everything from C:\Users\username\AppData\Roaming\npm-cache

AND

Deleting package-lock.json

Solution 16:^[16]

It's simple

npm cache clean --force

then install node dependencies by

npm install

Solution 17:^[17]

I resolved my problem with this one liner

npm cache clean --force

It works like a charm all the time. I love one liners. Note: since its a clean install, I had no concerns emptying npm cache.

Solution 18:^[18]

ERROR: npm ERR! Unexpected end of JSON input while parsing near '...ore-js":"3.0.0-beta.1

This occurs when installing the expo CLI globally, This works for me!

npm cache clean --force

Solution 19:^[19]

I got error (file already exists --force to overwrite) after running the following code:

npm cache clean --force
npm install -g @angular/cli

I solved it using :

npm i -g --force npm

Make sure to run the first commands to flush the cache of npm.

Solution 20:^[20]

npm cache clean --force
npm update

Do not forget to do "npm update". it is very important step .

Solution 21:^[21]

It's error from your npm....

So unistall node and install it again.

It works....

PS: After installing node again, install angular cli globally.

npm install -g @angular/cli@latest

Solution 22:^[22]

I solve that with

First delete package-lock.json

npm cache clean --force

then update npm

npm i npm@latest -g

then use npm install command

npm install

Solution 23:^[23]

You can use yarn package manager instead of npm.

It solved this problem for me

Solution 24:^[24]

If npm cache clean --force doesn't resolve the issue, try deleting the ~/.npm directory (*nix/macOS). This is the directory where node stores its cache, locks, logs, global packages (unless you're using nvm), and modules installed via npx.

First, backup your current ~./npm directory:

mv ~/.npm ~/.npm-backup

Now try running your npm command again. This will create a new ~/.npm directory. If the issue is resolved, you can safely remove you backup. Before doing so, you may want to review the global packages installed in your ~/.npm-backup directory so you can reinstall them using npm i -g [package].

rm -rf ~/.npm-backup

If the issue is not resolved, you can restore your backup:

rm -rf ~/.npm
mv ~/.npm-backup ~/.npm

Careful with those rm commands, folks!

Solution 25:^[25]

If you looking for npm install and getting same kind of error

Delete package-lock.json and npm cache clean --force and try

Solution 26:^[26]

In my case I changed the network to a much stronger one and npm install worked perfectly:

npm cache clean --force

Solution 27:^[27]

Instead of clearing the cache you can set a temporary folder:

npm install --cache /tmp/empty-cache

npm install --global --cache /tmp/empty-cache

As of npm@5, the npm cache self-heals from corruption issues and data extracted from the cache is guaranteed to be valid. If you want to make sure everything is consistent, use npm cache verify instead. On the other hand, if you're debugging an issue with the installer, you can use npm install --cache /tmp/empty-cache to use a temporary cache instead of nuking the actual one.

Solution 28:^[28]

For me I had to clone my branch again and do npm install

Solution 29:^[29]

I've faced this issue and I tried all the answers on Stackoverflow but not worked for me, finally I found solution for this issue:

First of all you have to uninstall nodejs and remove all the files related him
Go to "Register Editor" and search for all "nodejs", "node.js" and delete them
Restart your computer
And reinstall nodejs then install angular.

It's worked for me

Solution 30:^[30]

These commands worked for me

sudo npm cache clean --force

sudo npm cache verify

sudo npm i npm@latest -g

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1	Qonvex620
Solution 2
Solution 3
Solution 4	Amit Gaikwad
Solution 5	Paul Roub
Solution 6	Ravinder Reddy Kottabad
Solution 7	Christopher Grigg
Solution 8	WasiF
Solution 9	Shashwat Gupta
Solution 10	Hearen
Solution 11	milad karimi
Solution 12	WasiF
Solution 13	Nick
Solution 14	Desire Kaleba
Solution 15	ysvet
Solution 16	Leniel Maccaferri
Solution 17
Solution 18	Lahiru Amarathunge
Solution 19	Rijo
Solution 20	blackgreen
Solution 21	raghu rkm
Solution 22	Muhammad Tahir
Solution 23	Vahid Kh
Solution 24	jhildenbiddle
Solution 25	Overflowrun
Solution 26	Sercan
Solution 27	Gianfranco P.
Solution 28	mtchuente
Solution 29	Mohamad Alhamid
Solution 30	Paul Roub

'NPM Install Error:Unexpected end of JSON input while parsing near '...nt-webpack-plugin":"0'

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